INFINITI FX35 2004 Service Manual

ATC-112
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
COMPONENT INSPECTION
Sunload Sensor
Measure voltage between unified meter and A/C amp. harness con-
nector M57 terminal 50 (LG) and ground.
If NG, replace sunload sensor.

When checking sunload sensor, select a place where sun shines directly on it.
RJIA2030E
SHA930E

TROUBLE DIAGNOSIS
ATC-113
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2004 November 2004 FX35/FX45
Intake Sensor CircuitAJS00157
COMPONENT DESCRIPTION
Intake Sensor
The intake sensor is located on the heater & cooling unit. It converts
temperature of air after it passes through the evaporator into a resis-
tance value which is then input to the unified meter and A/C amp.
DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR
SYMPTOM: Intake sensor circuit is open or shorted. (24 or −24 is
indicated on unified meter and A/C amp. as a result of performing
Self-diagnosis STEP-2.)
1. CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND
1. Disconnect intake sensor connector.
2. Turn ignition switch ON.
3. Check voltage between intake sensor harness connector M254
terminal 2 (R) and ground.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
2. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between intake sensor harness connector
M254 terminal 1 (W) and unified meter and A/C amp. harness
connector M57 terminal 49 (W/G).
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
RJIA0928E
RJIA1458E
2 – Ground : Approx. 5V
RJIA2031E
1 – 49 : Continuity should exist.
RJIA2032E

ATC-114
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
3. CHECK INTAKE SENSOR
Refer to AT C - 11 4 , "
Intake Sensor" .
OK or NG
OK >> 1. Replace unified meter and A/C amp.
2. Go to self-diagnosis AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> 1. Replace intake sensor.
2. Go to self-diagnosis AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
4. CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.
1. Turn ignition switch OFF.
2. Disconnect unified meter and A/C amp. connector.
3. Check continuity between intake sensor harness connector
M254 terminal 2 (R) and unified meter and A/C amp. harness
connector M57 terminal 41 (P).
4. Check continuity between intake sensor harness connector
M254 terminal 2 (R) and ground.
OK or NG
OK >> 1. Replace unified meter and A/C amp.
2. Go to self-diagnosis AT C - 5 4 , "
FUNCTION CONFIRMATION PROCEDURE" and perform self-
diagnosis STEP-2. Confirm that code No. 20 is displayed.
NG >> Repair harness or connector.
COMPONENT INSPECTION
Intake Sensor
After disconnecting intake sensor connector M254, measure resis-
tance between terminals 1 and 2 at sensor side, using the table
below.
If NG, replace intake sensor.2 – 41 : Continuity should exist.
2 – Ground : Continuity should not exist.
RJIA2033E
Temperature °C (°F) Resistance kΩ
−15 (5) 12.34
−10 (14) 9.62
−5 (23) 7.56
0 (32) 6.00
5 (41) 4.80
10 (50) 3.87
15 (59) 3.15
20 (68) 2.57
25 (77) 2.12
30 (86) 1.76
35 (95) 1.47
40 (104) 1.23
45 (113) 1.04
RJIA2034E

CONTROLLER
ATC-115
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2004 November 2004 FX35/FX45
CONTROLLERPFP:27500
Removal and Installation of A/C and AV SwitchAJS001BN
REMOVAL
Remove cluster lid C. Refer to IP-11, "Removal and Installation" .
INSTALLATION
Installation is basically the reverse order of removal.

ATC-116
AUTO AMP
Revision: 2004 November 2004 FX35/FX45
AUTO AMPPFP:27760
Removal and Installation of Unified Meter and A/C Amp.AJS00159
REMOVAL
1. Remove the audio unit. Refer to AV- 4 4 , "Removal and Installation of Audio Unit" .
2. Remove the fixing screws, then remove the unified meter and A/
C amp.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA2035E

AMBIENT SENSOR
ATC-117
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2004 November 2004 FX35/FX45
AMBIENT SENSORPFP:27722
Removal and InstallationAJS0015A
REMOVAL
1. Remove front grille. Refer to EI-23, "FRONT GRILLE" .
2. Disconnect ambient sensor connector.
3. Remove ambient sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA2016E

ATC-118
IN-VEHICLE SENSOR
Revision: 2004 November 2004 FX35/FX45
IN-VEHICLE SENSORPFP:27720
Removal and InstallationAJS0015B
REMOVAL
1. Remove instrument driver lower panel. Refer to IP-11, "Removal and Installation" .
2. Remove mounting screw, and then remove in-vehicle sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA2036E

SUNLOAD SENSOR
ATC-119
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2004 November 2004 FX35/FX45
SUNLOAD SENSORPFP:27721
Removal and InstallationAJS0015C
REMOVAL
1. Remove front defroster grille (right side). Refer to IP-11, "Removal and Installation" .
2. Disconnect sunload sensor connector.
3. Remove sunload sensor.
INSTALLATION
Installation is basically the reverse order of removal.
RJIA2026E

ATC-120
INTAKE SENSOR
Revision: 2004 November 2004 FX35/FX45
INTAKE SENSORPFP:27723
Removal and InstallationAJS0015D
REMOVAL
1. Set the temperature at 18°C (60°F), and then disconnect the battery negative cable.
2. Use a refrigerant collecting equipment (for HFC-134a) to discharge refrigerant.
3. Remove the mounting bolt, and then remove the low-pressure pipe 2 and high-pressure pipe 3. Refer to
ATC-151, "
Removal and Installation of Low-pressure Pipe 2 and High-pressure Pipe 3" .
CAUTION:
Seal connection opening of piping with a cap or vinyl tape to avoid exposure to atmosphere.
4. Slide the evaporator to passenger side, and then remove the
intake sensor.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Replace O-rings for A/C piping with new ones. Before installing, apply compressor oil to them.

Connection point for female-side piping is thin. So, when inserting male-side piping, take care not
to deform female-side piping. Slowly insert in axial direction.

Insert one-touch joint connection point securely until it clicks.

After piping has been connected, pull male-side piping by hand to make sure piping does not
come off.

When recharging refrigerant, check for leaks.
RJIA0928E

BLOWER UNIT
ATC-121
C
D
E
F
G
H
I
K
L
MA
B
AT C
Revision: 2004 November 2004 FX35/FX45
BLOWER UNITPFP:27200
Removal and InstallationAJS0015E
REMOVAL
1. Remove instrument passenger lower panel. Refer to IP-11, "Removal and Installation" .
2. Remove ECM with bracket attached.
3. Disconnect intake door motor connector and blower fan motor
connector.
4. Remove harness clip from blower unit.
5. Remove mounting bolt and screws (2), from blower unit.
CAUTION:
Move blower unit rightward, and remove locating pin (1)
and joint. Then remove blower unit downward.
6. Remove blower unit.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:
Make sure locating pin (1) and joint are securely inserted.
RJIA2039E
RJIA0943E